How to Properly Maintain and Install the Engine Control Module on a Mercury Mariner?

A proper service of the Engine Control Module requires disconnecting the battery ground cable as the first step. The wiring harness should be gently positioned to one side after unstudding the powertrain control module (PCM) stud bolt nut. Detach the three PCM electrical connectors and eliminate the PCM by unscrewing the stud bolts while installing the bolts with a torque of 9 Nm (80 lb-in). The service requires removing the PCM cowl seal followed by reinstallation that includes torquing the bolts to 9 Nm (80 lb-in).

How to remove and replace the Engine Control Module (ECM) on Mercury Mariner?

The PCM replacement process requires access to all customer keys because PCM replacement does not demand replacement keys during installation. Initiate the procedure for Programmable Module Installation to receive the module configuration. Start the procedure by taking off the PCM stud bolt nut before setting the wiring harness to the side. Begin the procedure by disconnecting the three electrical connectors attached to the PCM followed by removing the two stud bolts then the PCM before putting the PCM cowl seal back in place. Start by placing the PCM cowl seal and afterward install the PCM by attaching its two stud bolts which need to be tightened to a torque of 6 Nm (53 lb-in). After connecting the three PCM electrical connectors install the PCM stud bolt nut to a tightness of 6 Nm (53 lb-in). Afterward restore the module configuration through instructions found in the Programmable Module Installation document while reprogramming the passive anti-theft system (PATS) through the Key Programming Using Two Programmed Keys process.

OEM Mercury Mariner Engine Control Module

Engine Control Computer

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43 Engine Control Modules found

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Mercury Mariner ECM Part Number: AL8Z-12A650-ACC
$326.62 MSRP: $451.84
You Save: $125.22 (28%)
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Product Specifications
- Other Name: Module - Engine Control - EEC; Engine Control Module
- Replaces: AL8Z-12A650-ACA, AL8Z-12A650-ACB
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2010 Mercury Mariner | Base, Premier | 6 Cyl 3.0 L FLEX
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Mercury Mariner ECM Part Number: AL8Z-12A650-BLF
$373.04 MSRP: $516.07
You Save: $143.03 (28%)
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Product Specifications
- Other Name: Module - Engine Control - EEC; Engine Control Module
- Replaces: AL8Z-12A650-BLD, AL8Z-12A650-BLE
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2011 Mercury Mariner | Base | 4 Cyl 2.5 L GAS
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Mercury Mariner ECM Part Number: 8U7Z-12A650-YA
$471.03 MSRP: $691.67
You Save: $220.64 (32%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Module - Engine Control - EEC; Engine Control Module
- Replaces: 8L8Z-12A650-BCA
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2008 Mercury Mariner | Base | 4 Cyl 2.3 L GAS
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Mercury Mariner ECM Part Number: AL8Z-12A650-BKF
$615.04 MSRP: $911.17
You Save: $296.13 (33%)
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Product Specifications
- Other Name: Module - Engine Control - EEC; Engine Control Module (ECM); Module - Engine Control - Eec V; Engine Control Module
- Replaces: AL8Z-12A650-BKE, AL8Z-12A650-BKD
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2011 Mercury Mariner | Base | 4 Cyl 2.5 L GAS
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Mercury Mariner ECM Part Number: 8U7Z-12A650-XARM
$445.40 MSRP: $698.33
You Save: $252.93 (37%)
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Product Specifications
- Other Name: Reman Module - Engine Control - EEC; Engine Control Module (ECM)
- Replaces: 8U7Z-12A650-XA, 8L8Z-12A650-AEB, 8L8Z-12A650-AYA
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2008 Mercury Mariner | Base | 4 Cyl 2.3 L GAS
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Mercury Mariner ECM Part Number: AL8Z-12A650-ATC
$674.44 MSRP: $999.17
You Save: $324.73 (33%)
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Product Specifications
- Other Name: Module - Engine Control - EEC; Engine Control Module (ECM); Module - Engine Control - Eec V; Engine Control Module
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2011 Mercury Mariner | Base, Premier | 6 Cyl 3.0 L FLEX
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Mercury Mariner ECM Part Number: 8L8Z-12A650-AZA
$707.63 MSRP: $1048.33
You Save: $340.70 (33%)
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Product Specifications
- Other Name: Module - Engine Control - EEC; Engine Control Module (ECM); Module - Engine Control - Eec V; Engine Control Module
- Manufacturer Note: 8M72A20520 (ZEB0)
- Replaces: 8L8Z-12A650-AGB
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2008 Mercury Mariner | Base | 4 Cyl 2.3 L GAS
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Mercury Mariner ECM Part Number: AL8Z-12A650-BRF
$626.18 MSRP: $927.67
You Save: $301.49 (33%)
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Product Specifications
- Other Name: Module - Engine Control - EEC; Engine Control Module (ECM); Module - Engine Control - Eec V; Engine Control Module
- Replaces: AL8Z-12A650-BRE, AL8Z-12A650-BRD
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2011 Mercury Mariner | Base, Premier | 6 Cyl 3.0 L FLEX
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Mercury Mariner ECM Part Number: AL8Z-12A650-AKA
$316.19 MSRP: $437.42
You Save: $121.23 (28%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Module - Engine Control - EEC; Engine Control Module (ECM); Engine Control Module
- Replaces: AL8Z-12A650-YA
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2010 Mercury Mariner | Base, Premier | 4 Cyl 2.5 L GAS
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Mercury Mariner ECM Part Number: AL8Z-12A650-AGA
Product Specifications
- Other Name: Module - Engine Control - EEC; Engine Control Module (ECM); Engine Control Module
- Replaces: AL8Z-12A650-VB
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2010 Mercury Mariner | Base, Premier | 4 Cyl 2.5 L GAS
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Mercury Mariner ECM Part Number: AL8Z-12A650-ARB
Product Specifications
- Other Name: Module - Engine Control - EEC; Engine Control Module (ECM); Module - Engine Control - Eec V; Engine Control Module
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2011 Mercury Mariner | Base | 4 Cyl 2.5 L GAS
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Mercury Mariner ECM Part Number: 9L8Z-12A650-ACB
Product Specifications
- Other Name: Module - Engine Control - EEC; Engine Control Module (ECM); Engine Control Module
- Manufacturer Note: 9M71A30X21 (FEC1)
- Replaces: 9L8Z-12A650-ACA, 9L8Z-12A650-PJ, 9L8Z-12A650-PH, 9L8Z-12A650-PK
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2009 Mercury Mariner | Base, Premier | 6 Cyl 3.0 L GAS
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Mercury Mariner PCM, Black Oak Part Number: 5L8Z-12A650-FK
Product Specifications
- Other Name: Module - Pcm - Black; Engine Control Module (ECM); ECM; Module - Pcm - Black Oak; Engine Control Module
- Manufacturer Note: 5M11A20511 (FMR9)
- Replaces: 5L8Z-12A650-FJ
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2005-2006 Mercury Mariner | Base, Convenience, Hybrid | 4 Cyl 2.3 L FULL HYBRID EV-GAS (FHEV), 4 Cyl 2.3 L GAS
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Mercury Mariner ECM, Black Oak Part Number: 5L8Z-12A650-NH
Product Specifications
- Other Name: Module - Pcm - Black Oak; Engine Control Module (ECM); Engine Control Module
- Manufacturer Note: 5M12A20511 (NAZ7)
- Replaces: 5L8Z-12A650-NG
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2005-2006 Mercury Mariner | Base, Convenience, Hybrid | 4 Cyl 2.3 L FULL HYBRID EV-GAS (FHEV), 4 Cyl 2.3 L GAS
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Mercury Mariner PCM Part Number: 6L8Z-12A650-TC
Product Specifications
- Other Name: Module - Engine Control - EEC; Engine Control Module (ECM); Module - Engine Control - Eec V
- Manufacturer Note: 6M11A20510 (YVV2)
- Replaces: 6L8Z-12A650-TB
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2006-2007 Mercury Mariner | Convenience | 4 Cyl 2.3 L GAS
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Mercury Mariner PCM Part Number: 6U7Z-12A650-BTBRM
Product Specifications
- Other Name: Reman Module - Engine Control - EEC; Engine Control Module (ECM); Engine Control Module; ECM
- Replaces: 5L8Z-12A650-LH, 6U7Z-12A650-BTA, 6L8Z-12A650-XB, 6U7Z-12A650-BTARM
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2005-2007 Mercury Mariner | Luxury, Premier | 6 Cyl 3.0 L GAS
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Mercury Mariner ECM Part Number: 9L8Z-12A650-AEC
Product Specifications
- Other Name: Module - Engine Control - EEC; Engine Control Module (ECM); Module - Engine Control - Eec V; Engine Control Module
- Manufacturer Note: 9M71A20522 (NKE2)
- Replaces: 9L8Z-12A650-AF, 9L8Z-12A650-AEB, 9L8Z-12A650-AEA
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2009 Mercury Mariner | Base, Premier | 4 Cyl 2.5 L GAS
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Mercury Mariner ECM Part Number: 9L8Z-12A650-DG
Product Specifications
- Other Name: Module - Engine Control - EEC; Engine Control Module (ECM); Module - Engine Control - Eec V; Engine Control Module
- Manufacturer Note: 9M72A20A10 (BMH6)
- Replaces: 9L8Z-12A650-DF
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2009 Mercury Mariner | Base, Premier | 4 Cyl 2.5 L GAS
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Mercury Mariner PCM Part Number: 6M6Z-12A650-BDRM
Product Specifications
- Other Name: Reman Module - Engine Control - EEC
- Replaces: 5U7Z-12A650-UA, 6M6Z-12A650-BC, 6M6Z-12A650-BD, 5M6Z-12A650-KB, 5M6Z-12A650-KC
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2006 Mercury Mariner | Hybrid | 4 Cyl 2.3 L FULL HYBRID EV-GAS (FHEV)
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Mercury Mariner ECM Part Number: AL8Z-12A650-BMC
Product Specifications
- Other Name: Module - Engine Control - EEC; Engine Control Module (ECM); Module - Engine Control - Eec V; Engine Control Module
- Replaces: AL8Z-12A650-BMB
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2011 Mercury Mariner | Base | 4 Cyl 2.5 L GAS

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Mercury Mariner Engine Control Module

OEM Engine Control Module boasts unmatched quality. Each part goes through full quality checks. They adhere to Mercury's official factory standards. These steps remove flaws and inconsistencies. So you can get Engine Control Module with long life and a perfect fit. Come to our website and find genuine Mercury Mariner parts. We keep a wide inventory of OEM Mariner parts at the highly affordable prices. It's easy to search, compare, and pick what you need. You'll love the clear info and simple checkout. We offer top-rated customer service, and we reply fast. We also ship promptly to ensure your order arrives on time.

The Mercury Mariner Engine Control Module or ECM is another part with high rumour of quality and efficiency; it is the control hub that regulates functions of different models of the Mariner. A high-end Mercury Engine Control Module takes input in the form of data from various important sensors including oxygen and throttle position sensors to efficiently manage the air-fuel mixture and idle speed so as to have proper combustion and using the least amount of fuel required. Mercury Mariner ECM has changed slightly over the time, new and rebuilt ones are available on the market, and it is specifically manufactured to work at optimal levels. The ECM is model-specific for Mariner models which makes the modification to be compatible with the vehicle, improving its efficiency and safety. The Mercury Mariner ECM is an example of a modern automotive product because it is equipped with extra features for vehicle management and tuning and is therefore crucial for cars' owners, who are interested in achieving effective and individualized car performances. Notably, the Mercury Mariner was the first time that was incorporating four-cylinder engine since the year 2002, this demonstrate the innovation of the brand. Due to enhancing the engines fuel economy and performance, the Mercury Mariner Engine Control Module have become an important and essential component of the car to ensure that drivers get a smooth ride. Altogether, the Mercury Mariner ECM is the evidence of the brand's commitment to producing high quality and reliable automobile vehicles in the market.

Mercury Mariner Engine Control Module Parts and Q&A

PCM, Black Oak
5L8Z-12A650-FK
Q: How to Properly Maintain and Install the Engine Control Module on a Mercury Mariner?
A:
A proper service of the Engine Control Module requires disconnecting the battery ground cable as the first step. The wiring harness should be gently positioned to one side after unstudding the powertrain control module (PCM) stud bolt nut. Detach the three PCM electrical connectors and eliminate the PCM by unscrewing the stud bolts while installing the bolts with a torque of 9 Nm (80 lb-in). The service requires removing the PCM cowl seal followed by reinstallation that includes torquing the bolts to 9 Nm (80 lb-in).
ECM
8L8Z-12A650-BEARM
Q: How to remove and replace the Engine Control Module (ECM) on Mercury Mariner?
A:
The PCM replacement process requires access to all customer keys because PCM replacement does not demand replacement keys during installation. Initiate the procedure for Programmable Module Installation to receive the module configuration. Start the procedure by taking off the PCM stud bolt nut before setting the wiring harness to the side. Begin the procedure by disconnecting the three electrical connectors attached to the PCM followed by removing the two stud bolts then the PCM before putting the PCM cowl seal back in place. Start by placing the PCM cowl seal and afterward install the PCM by attaching its two stud bolts which need to be tightened to a torque of 6 Nm (53 lb-in). After connecting the three PCM electrical connectors install the PCM stud bolt nut to a tightness of 6 Nm (53 lb-in). Afterward restore the module configuration through instructions found in the Programmable Module Installation document while reprogramming the passive anti-theft system (PATS) through the Key Programming Using Two Programmed Keys process.